JP2579866B2 - Wood brick manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a wooden brick in which a plurality of logs are integrated, which is useful as a pavement material used for a sidewalk or a floor of a building.

[0002]

2. Description of the Related Art As effective use of thinning materials having little utility value, a plurality of wooden bricks or logs processed into a cube are established in a molding form, and a solidified material such as synthetic resin or cement mortar is injected into the form. In addition, there has been proposed a method of manufacturing a wooden brick block in which wooden bricks are connected to each other (Japanese Patent Application Laid-Open Nos. 61-60907 and 61-13445).
No. 6, JP-A-63-161202, JP-A-63-161202
3-172606, JP-A-1-235701, etc.).

[0003] In these prior arts, there is an advantage that the labor for laying the wooden bricks on the sidewalk or the like can be reduced by connecting the wooden bricks or logs in a block shape. However, since only the inter-peripheries of the wooden bricks or logs formed in a block shape are connected via the solidified material, the bonding strength between the wooden bricks or logs is insufficient, and the traffic of a car or the like occurs. Where possible, cracks occurred at the joints between the wooden bricks or logs, making it unbearable for long-term use.

[0004] In Japanese Patent Application Laid-Open No. 59-91006, a wooden brick sandwiched between molds is poured into a container containing a binder having appropriate fluidity while being poured at one time.
It is placed on the binder, then the top surface of the wooden bricks is pressed with a holding plate to make the surface unevenness between the wooden bricks flat, and then the binder is filled in the gaps between the wooden bricks, so that the gap between the wooden bricks can be reduced. A method of manufacturing a wooden brick is disclosed in which a bonding material is bonded to form a bonding layer having a thickness of 0.5 to 30 mm from the lower surface of the wooden brick across the bottom of the wooden brick.
According to this method, the bonding strength between the wooden bricks or logs is improved.

[0005]

However, according to the above-mentioned manufacturing method, the wooden bricks are placed on a binder having fluidity, and the upper surface of the wooden bricks is pressed by a holding plate to make the surface unevenness of the wooden bricks. The wooden bricks are pressed in a very unstable state because they are aligned evenly, and the strength of the pressing force causes the wooden bricks to sink into the binder and the wooden brick upper surface to have an uneven height It was difficult to obtain a stable quality product.

Further, conventional wooden bricks have a drawback in that since they are formed from resin or mortar, the water permeability of rainwater or the like is low, and water accumulates in rainy weather, making the road surface slippery.

[0007]

SUMMARY OF THE INVENTION The object of the present invention is to improve the durability and the quality stability of such a wooden brick, and to provide the same length within a wooden brick-shaped mold. A plurality of logs that have been cut and preserved are formed on the bottom surface of the mold so that the area occupied by the end surfaces of the logs on the wooden brick surface is 40 to 75%, and the upper ends of the established logs are connected to each other via a connection fitting. Connected, particle size 0.1 ~ 10.0mm
By injecting a solidified material obtained by mixing an aggregate of the above and a molding material having a volume of 7 to 30% of the aggregate into the form so as to be higher than the height of the established logs, a plurality of logs are integrally solidified by the solidified material. It solves the intended problem.

Further, in the above manufacturing method, the solidified solidified material is made to have elasticity by using at least one of an elastic aggregate and a molding material as the solidified material, so that the solidified solidified material has elasticity. This enhances the ability to follow the expansion and contraction and durability against impact.

As logs used in the method of the present invention, domestic karamatsu and beech which are excellent in durability and strength and have little expansion and contraction due to water absorption are preferable, but from the viewpoint of effective use of thinned wood. Although the above performance shows a slight variation, the use of thinned wood produced locally such as cypress and cedar is effective. Furthermore, cypress is particularly preferable because the density of wood is generally higher than that of cedar, so that the amount of the processing agent required for the preservative treatment is small and the expansion and contraction due to water absorption can be suppressed. Further, it is suitable that the diameter of the log is 30 to 150 mm and the length is 20 to 80 mm.

For the preservative treatment of logs, a sufficiently dried log is placed in a pressure vessel and impregnated with a resin such as a plastic polymer and a preservative such as creosote oil for several hours.

As an aggregate, as a material having strength,
Natural sand (river sand, sea sand, crushed stone, pumice, cold water stone, etc.), artificial sand (glass beads, ceramic grains, bricks, tiles, tile crushed stone, etc.), lightweight aggregate (pearlite with low foaming ratio, etc.),
Resin particles (pulverized thermosetting resin or the like) are used, and rubber chips, polyurethane chips, rubber chips, and the like can be used as those having elasticity.

As the molding material, an epoxy resin, acrylic resin, polyester resin, polyurethane resin and an elastic acrylic synthetic resin emulsion having good miscibility with cement as a water-based resin having a durability to external use are 0.3 to cement ratio. ~ 1.5 mixed with aggregate
It can be used as cement resin mortar. The amount of the molding material used depends on the amount of impregnation into the aggregate or the strength of the solidified material, but is preferably 7 to 30% by volume of the aggregate.

[0013]

According to the method of the present invention, the area occupied by the end face of the log on the wooden brick surface is 40 to 75 on the bottom surface in the formwork.
%, A suitable strength can be imparted to the wooden brick, and the end face of the log is largely exposed on the surface of the wooden brick, so that the appearance of the woodgrain is not impaired and the particle size is 0 as a solidified material. Since the aggregate of 0.1 to 10.0 mm and the molding material having a small volume of 7 to 30% of the aggregate are used, the amount of the molding material exposed on the surface of the molded wooden brick is reduced. The appearance is harmonious with that of the aggregate, and it has excellent water permeability such as rainwater.

Further, according to the method of the present invention, a plurality of logs are established on the bottom surface in the formwork, and upper ends of the logs are connected to each other with a connecting metal fitting so that the height of the solidified material is higher than the height of the established logs. Since the plurality of logs are integrally solidified by the solidification material by being injected into the frame, the bonding strength between the logs can be improved, and a wooden brick of constant quality which is not affected by the manufacturing process can be provided.

In the method of the present invention, when at least one of an elastic aggregate and a molding material is used as the solidified material, and the solidified solidified material has elasticity, the solidified material has a temperature and / or humidity. It has the ability to follow the expansion and contraction of logs due to changes and the durability by impact.

[0016]

EXAMPLE A plurality of logs 1 cut to a uniform length on the inner bottom surface of a mold 2 and subjected to a preservative treatment are established so that the area occupied by the end faces of the logs 1 on the surface of the wooden brick 5 is 40 to 75% ( FIG. 1 (A)). Next, the upper ends of the logs are connected to each other by the connection fitting 3 (FIG. 1B). The solidification material 4 has a particle size of 0.1
It is prepared by mixing an aggregate of about 10.0 mm and a molding material having a volume of 7 to 30% of the aggregate. Then, the solidified material 4 is transferred to the log 1
Are injected into the established mold form 2 so as to fill the corners until it becomes the same height as the log 1 (FIG. 1 (C)). Further, a solidified material 4 having a thickness of 10 to 20 mm is added so as to be higher than the upper end of the log 1 and compressed and smoothed (FIG. 1 (D)). After the solidified material 4 has hardened, it is released from the mold, and the wooden brick 5 is obtained.

If the area occupied by the end face of the log 1 on the surface of the wooden brick 5 falls within the range of 40 to 75%, it is poor for the woodgrain appearance to be exhibited if the area is smaller than this range. If it is large, the amount of the solidified material will be small, and the strength of the wooden brick will be insufficient.

The surface of the wooden brick 5 is on the bottom surface side in the formwork 2 and the log 1 is in contact with the bottom surface of the formwork 2. It does not hurt the appearance of the surface of the wooden brick 5 by wrapping around.

If only the position of the upper end level of the solidified material 4 injected into the mold 2 is kept constant, a wooden brick 5 having a uniform shape and quality can be obtained.

[0020]

Example 1 A plurality of logs 1 cut to a length of 30 mm and subjected to an antiseptic treatment were established in a mold 2 and each side was 10 m in length.
The upper ends of the logs 1 are connected to each other by a connection fitting 3 made of a stainless steel mesh having a diameter of at least m and a diameter of at least 0.3 mm. As the aggregate, dried river sand sieved to a particle size of 0.5 to 5 mm was used, and as a molding material, an epoxy resin having a ratio of the main agent to the curing agent of 10: 4 was used. Then, an aggregate and a molding material corresponding to 10% of the volume of the aggregate were mixed to prepare an epoxy resin mortar as the solidified material 4. Then, the coagulated material 4 is poured into the mold 2 where the log 1 is established, heated to 50 to 70 degrees Celsius, hardened the coagulated material 4 for 30 minutes to 3 hours, cooled, and then demolded. Thus, wood brick 5 was obtained.

Wooden brick 5 manufactured according to the first embodiment
Is suitable when the hardness of the solidified material 4 is high and the log 1 hardly undergoes expansion and contraction due to water absorption or the like.

[0022]

EXAMPLE 2 A log 1 was cut into pieces having a length of 50 mm and subjected to an antiseptic treatment, and a plurality of pieces were established in a formwork 2. 1 are interconnected. The aggregate was prepared by cutting tire rubber to 1 to 3 mm and sieving the tire rubber, and the particle size was 0.1 mm.
A mixture of dried river sand sieved to 5 to 5 mm in the same volume ratio was used, and a polyurethane resin (one-pack) was used as a molding material. Then, an aggregate and a molding material corresponding to a volume of 15% of the aggregate were mixed to produce a polyurethane elastic resin mortar as the solidified material 4. Then, the solidified material was poured into a mold 2 in which a log 1 was established, heated at 50 to 70 degrees Celsius to harden the solidified material 4, cooled, and demolded to obtain a wooden brick 5.

Wooden brick 5 manufactured according to the second embodiment
Even if the log 1 slightly expands due to water absorption, the solidified material 4 has elasticity, so that the wooden brick 5 itself maintains its original shape.

[0024]

Embodiment 3 A plurality of logs 1 cut to a length of 40 mm and subjected to an antiseptic treatment are established in a formwork 2 and connected by metal fittings 3 made of a metal lath cut into a wooden brick surface shape.
The upper ends of the logs 1 are interconnected. Aggregate has a particle size of 0.5
Using pumice crushed to ~ 5mm, as a molding material,
An elastic acrylic synthetic resin emulsion and ordinary portland cement were mixed in the same volume ratio, and water and methyl cellulose (0.1% of cement ratio) were used. Then, the aggregate and a molding material having a solid content equivalent to 25% by volume of the aggregate were mixed to produce a cement elastic resin mortar as the solidified material 4. Then, the coagulated material 4 is poured into the mold 2 in which the log 1 is established, and this is steam-cured.
Was demolded after curing, and wood brick 5 was obtained.

Wooden brick 5 manufactured according to the third embodiment
Even if the log 1 slightly expands due to water absorption, the solidified material 4 has elasticity, so that the wooden brick 5 itself maintains its original shape.

Since cement is strongly alkaline, it promotes elution of coloring substances such as lignin and tannin in wood, and if this is not desired, a molding material consisting of resin alone may be selected.

The wooden brick obtained by the above embodiment is
As shown in FIGS. 2 (A), 2 (B), and 2 (C), the shape of the form 2 may be square, rectangular,
It can be molded into various shapes or sizes such as octagons, but in consideration of human transportation, strength or economics,
One side is 100-400mm, thickness is 30-80m
m and a specific gravity of 0.7 to 2.0 kg / cm ³ are appropriate.

In recent years, the water permeability required for laying materials such as parks and sidewalks has become an important issue due to flood control and the like.
Although the water permeability is improved, if it is too large, problems such as impairment of the moldability of the wooden brick 5 and filling of the aggregate and an insufficient porosity resulting in insufficient strength are recognized. Therefore, the aggregate having a particle size of about 0.1 to 10.0 mm is suitable for use, and preferably having a particle diameter of 0.5 to 5.0 mm has a good balance between strength and water permeability.

[0029]

According to the method of the present invention, the area occupied by the end face of the log on the surface of the wooden brick is 40 on the bottom in the formwork.
A plurality of logs are connected to each other at upper ends of the logs by connecting metal fittings, and a solidified material is injected into a mold so as to be higher than the height of the established logs. As a result, it is possible to impart appropriate strength to the wooden bricks, and the logs are exposed to the surface of the wooden bricks, so that the appearance of the woodgrain is not impaired, and the bonding strength between the logs can be improved. We can provide wood bricks of constant quality that are not affected by the process.

The solidified material has a particle size of 0.1 to 10.0 m.
m, and a mixture of a molding material having a small volume of 7 to 30% of the aggregate is used. Therefore, the molding material exposed on the surface of the molded wooden brick is reduced, and the log and the aggregate are reduced. And a wooden brick excellent in water permeability such as rainwater can be provided.

[0031]

[Brief description of the drawings]

FIG. 1 is an explanatory view of a process in the method of the present invention.

FIG. 2 is a perspective view showing an embodiment of a wooden brick manufactured by the method of the present invention.

Claims (2)

(57) [Claims] 1. In a mold having a wooden brick shape, a plurality of logs cut into equal lengths and preserved are placed on the bottom surface of the mold so that the area occupied by the end face of the log on the surface of the wooden brick is 40 to 75%. The upper ends of the logs thus established are connected to each other via a connection fitting, and a solidified mixture of an aggregate having a particle size of 0.1 to 10.0 mm and a molding material having a volume of 7 to 30% of the aggregate is mixed. A method for manufacturing a wooden brick, comprising: injecting a material into a mold so as to be higher than the height of an established log, and solidifying a plurality of logs with a solidified material. 2. The method for producing a wooden brick according to claim 1, wherein the solidified solid material has elasticity by using at least one of an elastic aggregate and a molding material as the solidified material.